protected void txtDocno_TextChanged(object sender, EventArgs e) { try{ DDLsubconfirmid.Items.Clear(); DDLsubconfirmid.DataSource = Specimen.Get_SubConfirmID_onDocumentNo(Convert.ToInt32(txtDocno.Text.ToString())); DDLsubconfirmid.DataBind(); DDLsubconfirmid.Items.Insert(0, new ListItem("-Select Sub Confirm ID-", "0")); DDLsubconfirmid.Focus(); } catch {} }